package com.wenhua.junshao.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.wenhua.junshao.common.BaseContext;
import com.wenhua.junshao.common.CustomerException;
import com.wenhua.junshao.entity.*;
import com.wenhua.junshao.mapper.OrderMapper;
import com.wenhua.junshao.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {


    @Autowired
    private OrderDetailService orderDetailService;
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;


    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取当前用户的id
        long userId = BaseContext.getCurrentId();

        //查询购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(queryWrapper);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new CustomerException("购物车不能为空");
        }
        //生成订单号
        long orderId = IdWorker.getId();
        //总金额
        AtomicLong amount = new AtomicLong(0L);
        //查询用户数据
        User user = userService.getById(userId);
        //查询地址数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        //组装订单信息

        //组装订单明细信息

        List<OrderDetail> orderDetailList = shoppingCartList.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //组装订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress(addressBook.getDetail());

        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetailList);

        //清空购物车数据
        shoppingCartService.remove(queryWrapper);
    }
}
